Anorectal stapler with negative pressure

Abstract

The invention discloses an anorectal stapler with negative pressure, which comprises a fixed component, an anvil component, an anvil moving component, a kissing component and a firing component; wherein the fixed component comprises a nail magazine, and the nail magazine is provided with at least one adsorption port; the kissing component comprises a nail pushing sheet and a cutting knife installed on the nail pushing sheet; the firing component is connected to the kissing component; the anvil component is connected to the anvil moving component; an adsorption channel connected to the adsorption port and suitable for being supplied with negative pressure is provided between the anvil component and the nail magazine; the anvil moving component is suitable for being actuated to drive the anvil component to move axially, and the anvil component has a firing position during the axial movement, and before the anvil component reaches the firing position, the adsorption channel supplied with negative pressure is suitable for adsorbing tissue from the adsorption port. The invention can negatively adsorb the prolapsed part of the mucosa, quickly and effectively complete the selective hemorrhoidectomy operation, and greatly reduce the workload of doctors.

Description

Technical Field

[0001] The invention relates to an anorectal stapler with negative pressure. Background Art

[0002] At present, TST selective hemorrhoidectomy is a treatment method designed according to the formation principle of human hemorrhoids. During the treatment process, it can accurately remove the prolapsed part of the mucosa on the hemorrhoids, and reverse the pathological cells from the pathological process of hemorrhoids to the development of normal cells, so that the anal cushion tissue and mucosal layer are retained to the greatest extent, and no effect will be produced on the normal physiological function of the human anorectal, and the trauma is minimized to the greatest extent. Because it is a selective resection treatment, the patient's recovery time after treatment is also shorter. The traditional anorectal stapler requires the doctor to make a purse during the operation, and the prolapsed part of the mucosa is pulled into the stapler before it can be fired. There is uneven pulling force in the process of pulling the tissue, and sometimes the pulling is not in place or over-pulling, resulting in unsatisfactory cutting and easy recurrence of the disease; the doctor's work intensity is high, time-consuming, and work efficiency is low during the operation. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the defects of the prior art and provide an anorectal stapler with negative pressure, which can negatively adsorb the prolapsed part of the mucosa, quickly and effectively complete the selective hemorrhoidectomy operation, and greatly reduce the workload of doctors.

[0004] In order to solve the above technical problems, the technical solution of the present invention is: a negative pressure anorectal stapler, which includes a fixing assembly, an anvil assembly, an anvil moving assembly, an anastomosis assembly and a firing assembly; wherein,

[0005] The fixing assembly includes a nail magazine, and the nail magazine is provided with at least one suction port;

[0006] The kiss-cutting assembly comprises a nail-pushing sheet and a cutting knife mounted on the nail-pushing sheet;

[0007] The firing assembly is connected to the kiss cutting assembly;

[0008] The anvil assembly is connected to the anvil moving assembly;

[0009] An adsorption channel connected to the adsorption port and suitable for being supplied with negative pressure is provided between the anvil assembly and the nail magazine;

[0010] The anvil seat moving assembly is suitable for being actuated to drive the anvil seat assembly to move axially, and the anvil seat assembly has a firing position during the axial movement. Before the anvil seat assembly reaches the firing position, the adsorption channel supplied with negative pressure is suitable for adsorbing tissue from the adsorption port; when the anvil seat assembly reaches the firing position, the tissue adsorbed by the adsorption channel is pressed between the anvil seat assembly and the nail magazine;

[0011] The firing assembly is suitable for being actuated after the anvil assembly reaches the firing position to push the kissing assembly so that the cutting knife, the suture staples in the staple magazine and the anvil assembly cooperate to kiss the tissue pressed between the anvil assembly and the staple magazine.

[0012] Furthermore, the dowel seat moving assembly is provided with a negative pressure channel connected to the adsorption channel, and negative pressure is supplied into the adsorption channel from the negative pressure channel.

[0013] Furthermore, in order to indicate the negative pressure of the negative pressure channel in the anorectal stapler well and facilitate the quick and effective completion of the operation, the anorectal stapler with negative pressure also includes an adsorption negative pressure indicating device; wherein the adsorption negative pressure indicating device includes:

[0014] An indicating negative pressure tube, wherein the indicating negative pressure tube has an isobaric cavity, and the isobaric cavity is connected to the negative pressure channel;

[0015] An indicator needle is slidably mounted on the indicating negative pressure tube, and at least a portion of the indicator needle extends into the isobaric chamber. The indicator needle is suitable for moving on the indicating negative pressure tube when the pressure in the isobaric chamber changes.

[0016] Furthermore, in order to facilitate the pressure relief of the negative pressure channel, the adsorption negative pressure indicating device also includes a pressure relief device;

[0017] The indicating negative pressure tube is provided with a pressure relief hole connected to the isobaric chamber;

[0018] The pressure relief device is suitable for being actuated to block the pressure relief hole or to open the pressure relief hole.

[0019] The head end of the nail magazine is sealed;

[0020] The rear end of the staple cartridge is sealed by a staple cartridge wall that accommodates the suture staples;

[0021] The anvil moving assembly passes through the nail magazine wall, and the connection portion between the anvil moving assembly and the nail magazine wall is sealed;

[0022] The head end of the nail magazine, the nail magazine wall and the peripheral wall of the nail magazine form an anvil accommodating cavity for accommodating the anvil assembly, and the adsorption channel is formed between the anvil assembly and the nail magazine wall;

[0023] Furthermore, the suction port is formed on the peripheral wall of the nail magazine.

[0024] The staple cartridge wall is provided with at least one staple hole portion for accommodating the suture staple and at least one cutting knife hole;

[0025] At least one sealing pad is provided on the nail magazine, and the sealing pad blocks the nail hole portion and the cutting knife hole.

[0026] Furthermore, at least two suction ports are provided along the circumference of the nail magazine;

[0027] The fixing component is provided with a separation groove between two adjacent adsorption ports in the circumferential direction thereof, which is suitable for embedding into tissues to separate the tissues.

[0028] Furthermore, the anvil moving assembly includes a pull rod assembly and a driving assembly connected to the pull rod assembly to drive the pull rod assembly to move axially; wherein,

[0029] The drive assembly comprises:

[0030] A push sleeve assembly rotatably connected to the pull rod assembly, the push sleeve assembly being movably mounted on the fixed assembly, and the push sleeve assembly being suitable for circumferential rotation on the fixed assembly;

[0031] A push block disposed between the push sleeve assembly and the fixed assembly to push the push sleeve assembly to move axially during the circumferential rotation of the push sleeve assembly;

[0032] An adjusting nut is rotatably connected to the fixing assembly, and the adjusting nut is connected to the pushing sleeve assembly.

[0033] Furthermore, the pull rod assembly includes a pull rod and a pull rod sleeve, the pull rod is slidably mounted on the fixed assembly, the pull rod is connected to the pull rod sleeve, and the pull rod sleeve is rotationally connected to the push sleeve assembly.

[0034] Furthermore, the anvil seat moving assembly is provided with a negative pressure channel connected to the adsorption channel, and negative pressure is supplied into the adsorption channel from the negative pressure channel;

[0035] A negative pressure pipe joint is provided at the rear end of the push sleeve assembly, and a joint channel is provided inside the push sleeve assembly;

[0036] The pull rod is provided with a hollow cavity; the hollow cavity, the joint channel, and the negative pressure pipe joint are connected to form a negative pressure channel.

[0037] Furthermore, the firing assembly includes a firing handle assembly and a nail pushing assembly, and the firing handle assembly is connected to the nail pushing sheet through the nail pushing assembly so as to drive the nail pushing sheet to move through the nail pushing assembly;

[0038] An elastic member is provided between the nail pushing assembly and the fixing assembly and is suitable for resetting the nail pushing assembly and the nail pushing sheet after firing.

[0039] Furthermore, the firing handle assembly includes a firing handle and a connecting rod, the connecting rod is hinged to the fixing assembly, the connecting rod is hinged to the firing handle, and the firing handle is hinged to the pin pushing assembly.

[0040] The push pin assembly includes a straight push rod and a firing push rod; wherein,

[0041] The head end of the straight push rod is connected to the nail pushing piece;

[0042] The rear end of the straight push rod is connected to the firing push rod;

[0043] The firing push rod is connected to the firing handle assembly.

[0044] Furthermore, in order to effectively avoid the movement of the firing handle when the anorectal stapler does not need to be fired, and to achieve the firing safety function well, the anorectal stapler with negative pressure also includes a firing safety device, and the firing safety device includes:

[0045] A safety lever hinged to the fixing assembly and adapted to prop open the firing handle to prevent the firing handle from moving;

[0046] A blocking device, the blocking device comprising a blocking assembly connected to the anvil moving assembly;

[0047] When the anvil assembly is not in the firing position and the safety rod opens the firing handle, the blocking device contacts the safety rod to block the safety rod from rotating;

[0048] When the anvil assembly reaches the firing position, the blocking assembly in the blocking device is driven by the anvil moving assembly to separate from the safety rod, and the safety rod is suitable for rotating to separate from the firing handle.

[0049] Further, the blocking assembly is adapted to prevent the safety bar from rotating backwards, and the blocking assembly comprises:

[0050] A moving block slidably connected to the fixed assembly and connected to the anvil moving assembly to move with the anvil moving assembly, the moving block being adapted to contact or disengage from the safety rod;

[0051] A stopper resetting elastic member is provided between the movable stopper and the fixed assembly to reset the movable stopper.

[0052] Furthermore, the blocking device further comprises a safety bar forward rotation blocking assembly, and the safety bar forward rotation blocking assembly comprises:

[0053] A forward rotation stopper is arranged on the fixing assembly and cooperates with the safety rod to stop the safety rod from rotating forward when the safety rod opens the firing handle.

[0054] After adopting the above technical solution, the present invention has the following beneficial effects:

[0055] 1. The present invention drives the anvil seat assembly to move through the anvil seat moving assembly, so that the distance between the anvil seat assembly and the nail magazine becomes smaller, the end of the anorectal stapler is inserted into the anus to a suitable position, the tissue is separated by the separation groove of the head, and then negative pressure is formed in the negative pressure channel to adsorb the prolapsed part of the tissue mucosa. As the tissue is adsorbed, it enters the adsorption channel of the anorectal stapler, and then the anvil seat moving assembly is moved to gradually move away from the nail magazine, so that the amount of tissue in the adsorption channel is gradually increased, and then the anvil seat moving assembly is moved to gradually squeeze the tissue in the adsorption channel. When the anvil seat assembly reaches the firing position, the pull rod sleeve pushes the moving block, opens the safety rod, and holds the firing handle to fire. After the firing is completed, the pressure relief device is opened to remove the negative pressure, and the anorectal stapler is withdrawn from the anus to complete the resection operation. In this way, the prolapsed part of the mucosa can be adsorbed by negative pressure, which is conducive to completing the operation quickly and effectively, and greatly reduces the workload of doctors.

[0056] 2. The adsorption negative pressure indicating device of the present invention is provided with an indicating negative pressure tube with an isobaric cavity, and the isobaric cavity is connected with the negative pressure channel of the anorectal stapler. When the pressure in the negative pressure channel changes, the pressure in the isobaric cavity will also change, thereby pushing the indicating needle to move on the indicating negative pressure tube. The operator can clearly understand the pressure change in the negative pressure channel through the transparent observation window provided on the fixed component, which is beneficial to the operation of the surgery;

[0057] 3. A blocking assembly is provided in the blocking device of the firing safety device of the present invention. When the anvil assembly reaches the firing position, the blocking assembly can be separated from the safety rod driven by the anvil moving assembly. At this time, the safety rod can be rotated and separated from the firing handle, so that the operator can operate the firing handle to realize the firing of the anorectal stapler; when the anvil assembly is not in the firing position and the safety rod opens the firing handle, the blocking assembly and the forward stopper in the blocking device jointly limit the rotation of the safety rod, and the firing handle cannot be moved at this time, thereby realizing the firing safety function and being very convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] Figure 1 A three-dimensional diagram of the anorectal stapler with negative pressure of the present invention;

[0059] Figure 2 It is a structural cross-sectional view of the anorectal stapler with negative pressure of the present invention;

[0060] Figure 3 It is a schematic diagram of the interior of the anorectal stapler with negative pressure of the present invention;

[0061] Figure 4is a three-dimensional diagram of a nail magazine of the present invention;

[0062] Figure 5 is a three-dimensional diagram of a sealing gasket of the present invention;

[0063] Figure 6 It is a three-dimensional diagram of the adsorption negative pressure indicating device of the present invention;

[0064] Figure 7 It is a structural cross-sectional view of the adsorption negative pressure indicating device of the present invention;

[0065] Figure 8 A three-dimensional diagram of the negative pressure indicating tube of the present invention;

[0066] Fig. 9 It is a structural schematic diagram of the firing safety device of the present invention;

[0067] Fig.10 It is a three-dimensional diagram of the moving stopper of the present invention. DETAILED DESCRIPTION

[0068] In order to make the contents of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments in conjunction with the accompanying drawings.

[0069] like Figures 1 to 10 As shown, a negative pressure anorectal stapler comprises a fixing assembly 1, an anvil assembly 2, an anvil moving assembly 3, an anastomosis assembly 4 and a firing assembly 5; wherein,

[0070] The fixing assembly 1 includes a nail magazine 11, and the nail magazine 11 is provided with at least one suction port 11a;

[0071] The kiss cutting assembly 4 includes a nail pushing piece 41 and a cutting knife 42 installed on the nail pushing piece 41;

[0072] The firing assembly 5 is connected to the kiss cutting assembly 4;

[0073] The anvil assembly 2 is connected to the anvil moving assembly 3;

[0074] An adsorption channel 10 is provided between the anvil assembly 2 and the nail magazine 11 and is connected to the adsorption port 11a and is suitable for being supplied with negative pressure;

[0075] The anvil moving assembly 3 is adapted to be actuated to drive the anvil assembly 2 to move axially. The anvil assembly 2 has a firing position during the axial movement. Before the anvil assembly 2 reaches the firing position, the adsorption channel 10 supplied with negative pressure is adapted to adsorb tissue from the adsorption port 11a. When the anvil assembly 2 reaches the firing position, the tissue adsorbed by the adsorption channel 10 is pressed between the anvil assembly 2 and the staple cartridge 11.

[0076] The firing assembly 5 is adapted to be actuated after the anvil assembly 2 reaches the firing position to push the kissing assembly 4 so that the cutting knife 42, the suture staples in the staple magazine 11 and the anvil assembly 2 cooperate to kiss the tissue pressed between the anvil assembly 2 and the staple magazine 11.

[0077] In this embodiment, if Figure 1 As shown, the fixing assembly 1 further includes a nail magazine sleeve 17 connected to the nail magazine 11 , a fixing handle 18 , and a rotating handle 19 rotatably connected between the nail magazine sleeve 17 and the fixing handle 18 .

[0078] like Figure 2 As shown, the anvil seat assembly 2 includes an anvil seat 21 and a washer ring 22 disposed in the anvil seat 21 .

[0079] Specifically, in the present embodiment, the suction channel 10 can change the suction pressure of the suction port 11 a by changing its size during the movement of the anvil assembly 2 .

[0080] like Figure 2 As shown, the anvil seat moving assembly 3 is provided with a negative pressure channel 20 connected to the adsorption channel 10, and the negative pressure is supplied into the adsorption channel 10 from the negative pressure channel 20.

[0081] like Figure 3 , 6 As shown in Figure 8, the anorectal stapler with negative pressure also includes an adsorption negative pressure indicating device 6; wherein the adsorption negative pressure indicating device includes:

[0082] The negative pressure indicating tube 61 has an isobaric cavity 61 a, and the isobaric cavity 61 a is in communication with the negative pressure channel 20;

[0083] The indicator needle 62 is slidably mounted on the indicating negative pressure tube 61, and at least a portion of the indicator needle 62 extends into the isobaric chamber 61a. The indicator needle 62 is suitable for moving on the indicating negative pressure tube 61 when the pressure in the isobaric chamber 61a changes.

[0084] Specifically, Figure 7 As shown, the isobaric chamber 61a is connected to the negative pressure channel 20 through a connecting mechanism; wherein,

[0085] The structure of the communication mechanism may be as follows, which includes:

[0086] The elbow 63 is connected to the negative pressure channel 20, and the elbow 63 is connected to the equal pressure chamber 61a through a hose.

[0087] Specifically, at least one limiting mechanism for limiting the position of the indicating negative pressure tube 61 is provided between the fixing assembly 1 and the indicating negative pressure tube 61 .

[0088] like Figure 8As shown, the limiting mechanism may be of the following structure, which includes:

[0089] A limiting wing 61c provided on one of the fixing assembly 1 and the negative pressure indicating tube 61;

[0090] A limiting groove is provided on the remaining one of the fixing assembly 1 and the indicating negative pressure tube 61 and is suitable for embedding into the limiting wing 61c.

[0091] In this embodiment, two limiting mechanisms are provided and are symmetrically arranged. The limiting wing 61c is arranged on the indicating negative pressure tube 61 in this embodiment, and the limiting groove is arranged on the fixing component 1 in this embodiment; of course, the limiting wing 61c can also be arranged on the fixing component 1, and the limiting groove is arranged on the indicating negative pressure tube 61.

[0092] Specifically, in this embodiment, Figure 6 As shown, an indicator needle reset elastic member 64 is provided between the indicator needle 62 and the negative pressure indicating tube 61 for resetting the indicator needle 62. The indicator needle reset elastic member may be a spring.

[0093] like Figures 6-8 As shown, the adsorption negative pressure indicating device 6 also includes a pressure relief device;

[0094] The indicating negative pressure tube 61 is provided with a pressure relief hole 61b connected to the equal pressure chamber 61a;

[0095] The pressure relief device is suitable for being actuated to block the pressure relief hole 61b or to open the pressure relief hole 61b.

[0096] The pressure relief device may be a pressure relief button 65 hinged on the fixing assembly 1 , and the pressure relief button 65 is provided with a plug that cooperates with the pressure relief hole 61 b ​​to block or open the pressure relief hole 61 b ​​by actuating the pressure relief button 65 .

[0097] Specifically, Figure 3 As shown, a transparent observation window 15 corresponding to the indicating portion of the indicator needle 62 may be provided on the fixing assembly 1 , and changes of the indicator needle 62 may be understood through the transparent observation window 15 .

[0098] The adsorption negative pressure indicating device 6 is provided with an indicating negative pressure tube 61 with an isobaric chamber 61a. The isobaric chamber 61a is connected to the negative pressure channel 20 of the anorectal stapler. When the pressure in the negative pressure channel 20 changes, the pressure in the isobaric chamber 61a will also change, thereby pushing the indicating needle 62 to move on the indicating negative pressure tube 61. The operator can clearly understand the pressure changes in the negative pressure channel 20 through the transparent observation window 15 provided on the fixed component 1, which is beneficial to the operation of the operation.

[0099] like Figure 1 , 2 As shown, the head end of the nail magazine 11 is sealed;

[0100] The rear end of the staple cartridge 11 is sealed by a staple cartridge wall 11b for accommodating suture staples;

[0101] The anvil moving assembly 3 passes through the nail magazine wall 11b, and the connection between the anvil moving assembly 3 and the nail magazine wall 11b is sealed; the sealing at this location can be achieved by at least one sealing ring;

[0102] The head end of the nail magazine 11, the nail magazine wall 11b and the peripheral wall of the nail magazine 11 form an anvil accommodating cavity for accommodating the anvil assembly 2, and the adsorption channel 10 is formed between the anvil assembly 2 and the nail magazine wall 11b;

[0103] The suction port 11 a is formed on the peripheral wall of the staple cartridge 11 .

[0104] In this embodiment, if Figure 1 , 2 As shown, the head end of the nail magazine 11 is sealed by a cover 14.

[0105] like Figure 4 As shown, the staple cartridge wall 11b is provided with at least one staple hole portion 11b1 for accommodating the suture staple and at least one cutting knife hole 11b2; the cutting knife hole 11b2 is used for the cutting knife 42 to pass through when firing.

[0106] like Figure 2 As shown, at least one sealing gasket 11c is provided on the nail magazine 11, and the sealing gasket 11c blocks the nail hole portion 11b1 and the cutting knife hole 11b2.

[0107] like Figure 2 As shown, at least two suction ports 11a are provided along the circumference of the nail magazine 11;

[0108] The fixing component 1 is provided with a separation groove 12 between two adjacent suction ports 11 a in the circumferential direction thereof, which is suitable for embedding into tissues to separate the tissues.

[0109] In the present embodiment, three suction ports 11 a are provided along the circumference of the nail magazine 11 . Of course, the number of the suction ports 11 is not limited to three, but may be other numbers.

[0110] Since there are three adsorption ports 11 a , there are correspondingly three separation grooves 12 . Of course, the number of separation grooves 12 may be other numbers.

[0111] Specifically, due to the three dividing grooves 12 and the three suction ports 11a, the nail magazine wall 11b is also divided into three blocks, each of which is provided with a nail hole portion 11b1 and a cutting knife hole 11b2. By arranging a sealing gasket 11c on each block corresponding to the nail magazine wall 11b, the nail hole portion 11b1 and the cutting knife hole 11b2 can be sealed. The sealing gasket 11c can be detached from the nail magazine wall 11b after the stapler is fired.

[0112] Specifically, Figure 4 , 5 As shown, a positioning mechanism is provided between the sealing gasket 11c and the nail magazine wall 11b to position the sealing gasket 11c on the nail magazine wall 11b; wherein,

[0113] The positioning mechanism includes:

[0114] A positioning post 11c1 provided on one of the sealing pad 11c and the nail magazine wall 11b;

[0115] A positioning hole 11b3 is provided on the remaining one of the sealing pad 11c and the staple cartridge wall 11b.

[0116] In this embodiment, the positioning column 11c1 is provided on the sealing pad 11c, and the positioning hole 11b3 is provided on the nail magazine wall 11b. A plurality of positioning columns 11c1 and positioning holes 11b3 may be provided.

[0117] Specifically, Figure 4 As shown, a nail magazine partition groove 11 d serving as at least a portion of the partition groove 12 is provided on the peripheral wall of the nail magazine 11 .

[0118] like Figure 2 As shown, the anvil moving assembly 3 includes a pull rod assembly and a driving assembly connected to the pull rod assembly to drive the pull rod assembly to move axially; wherein,

[0119] The drive components include:

[0120] A push sleeve assembly 31 rotatably connected to the pull rod assembly, the push sleeve assembly 31 is movably mounted on the fixed assembly 1, and the push sleeve assembly 31 is suitable for circumferential rotation on the fixed assembly 1;

[0121] A push block 32 is disposed between the push sleeve assembly 31 and the fixed assembly 1 to push the push sleeve assembly 31 to move axially during the circumferential rotation of the push sleeve assembly 31;

[0122] The adjusting nut 33 is rotatably connected to the fixing component 1 , and the adjusting nut 33 is connected to the pushing sleeve component 31 .

[0123] In this embodiment, by screwing the adjusting nut 33, the pushing sleeve assembly 31 is driven to rotate. Due to the setting of the push block 32, the pushing sleeve assembly 31 will move backward when it rotates, thereby driving the pull rod assembly to move backward. The dowel seat assembly 2 is installed on the pull rod assembly, so it can drive the dowel seat assembly 2 to move backward. The dowel seat assembly 2 can be moved forward by screwing the adjusting nut 33 in the opposite direction.

[0124] Specifically, Figure 2As shown, the pull rod assembly includes a pull rod 34 and a pull rod sleeve 35. The pull rod 34 is slidably mounted on the fixing assembly 1. The pull rod 34 is connected to the pull rod sleeve 35. The pull rod sleeve 35 is rotationally connected to the push sleeve assembly 35.

[0125] like Figure 1 As shown, the anvil seat moving assembly 3 is provided with a negative pressure channel 20 connected to the adsorption channel 10, and the negative pressure is supplied to the adsorption channel 10 from the negative pressure channel 20;

[0126] A negative pressure pipe joint 31a is provided at the rear end of the push sleeve assembly 31, and a joint channel 30 is provided inside the push sleeve assembly 31;

[0127] The pull rod 34 is provided with a hollow cavity 34 a ; the hollow cavity 34 a , the joint channel 30 , and the negative pressure pipe joint 31 a are connected to form a negative pressure channel 20 .

[0128] like Figure 2 As shown, in this embodiment, a hole 34b for connecting the adsorption channel 10 and the hollow cavity 31a is provided on the pull rod 34, and the pull rod 34 is connected to the anvil seat assembly 2. A plurality of holes 34b can be provided, not limited to one.

[0129] like Figure 3 As shown, the firing assembly 5 includes a firing handle assembly and a pin pushing assembly, and the firing handle assembly is connected to the pin pushing piece 41 through the pin pushing assembly so as to drive the pin pushing piece 41 to move through the pin pushing assembly;

[0130] An elastic member is provided between the nail pushing assembly and the fixing assembly 1 , which is suitable for restoring the nail pushing assembly and the nail pushing sheet 41 after firing.

[0131] like Figure 3 As shown, the firing handle assembly includes a firing handle 51 and a connecting rod 52, the connecting rod 52 is hinged to the fixing assembly 1, the connecting rod 52 is hinged to the firing handle 51, and the firing handle 51 is hinged to the pin pusher assembly.

[0132] like Figure 3 As shown, the nail push assembly includes a straight push rod 53 and a firing push rod 54; wherein,

[0133] The head end of the straight push rod 53 is connected to the nail pushing piece 54;

[0134] The rear end of the straight push rod 53 is connected to the firing push rod 54;

[0135] The firing push rod 54 is connected to the firing handle assembly.

[0136] In this embodiment, when firing, the firing handle 51 moves closer to the fixed handle 18, driving the firing push rod 54 to move forward, and the firing push rod 54 then drives the straight push rod 53 to move forward, and the straight push rod 53 drives the staple pusher 54 to move forward, and the suture staples in the staple magazine 11 are pressed into the tissue adsorbed by the adsorption channel 10, and at the same time the cutting knife 42 cuts the tissue to achieve a kissing operation.

[0137] like Figure 3 , 9 As shown in 10, the anorectal stapler with negative pressure also includes a firing safety device 7, and the firing safety device 7 includes:

[0138] A safety lever 71 hinged on the fixing assembly 1 and adapted to prop open the firing handle 51 to prevent the firing handle 51 from moving;

[0139] A blocking device, the blocking device comprising a blocking assembly connected to the anvil moving assembly 3;

[0140] When the anvil assembly 2 is not in the firing position and the safety rod 71 opens the firing handle 51, the blocking device contacts the safety rod 71 to block the safety rod 71 from rotating;

[0141] When the anvil assembly 2 reaches the firing position, the blocking assembly in the blocking device is driven by the anvil moving assembly 3 to disengage from the safety rod 71 , and the safety rod 71 is suitable for rotating to disengage from the firing handle 51 .

[0142] like Fig. 9 As shown, the blocking assembly is suitable for preventing the safety rod 71 from rotating backward, and the blocking assembly includes:

[0143] A moving stopper 72 slidably connected to the fixed assembly 1 and connected to the anvil seat moving assembly to move with the anvil seat moving assembly, the moving stopper 72 being adapted to contact or disengage from the safety rod 71;

[0144] A stopper resetting elastic member 73 is provided between the movable stopper 72 and the fixed assembly 1 to reset the movable stopper 72 .

[0145] In this embodiment, the stopper reset elastic member 73 may be a spring.

[0146] Specifically, in this embodiment, Fig. 9 As shown, at least one moving matching mechanism is provided between the pull rod sleeve 35 and the moving stop block 72 for driving the moving stop block 72 to move during at least a portion of the movement of the pin holder moving assembly 3; in this embodiment, two moving matching mechanisms are provided, but it is not limited to this.

[0147] Specifically, Fig. 9 As shown, the structure of the mobile matching mechanism may be as follows, which includes:

[0148] A groove 35a provided on the pull rod sleeve 35 and having a retaining wall 35b;

[0149] A slide bar 72a disposed on the movable stopper 72 and extending into the groove 35a;

[0150] When the anvil seat moving assembly 3 moves backward until the slide bar 72a abuts against the retaining wall 35b, the anvil seat moving assembly 3 drives the moving stopper 72 to move through the abutment cooperation between the slide bar 72a and the retaining wall 35b.

[0151] Specifically, Fig. 9 As shown, the firing handle 51 is provided with a slot 51 a suitable for the end of the safety rod 71 to be inserted.

[0152] Specifically, Fig. 9 As shown, at least one sliding groove 16 is provided on the fixing assembly 1 , and the moving stopper 72 includes a sliding plate 72 b , which is fitted in the sliding groove 16 .

[0153] like Fig. 9 As shown, the blocking device also includes a safety bar forward rotation blocking assembly, and the safety bar forward rotation blocking assembly includes:

[0154] A forward rotation stopper 13 is disposed on the fixing assembly 1 and cooperates with the safety rod 71 to stop the safety rod from rotating forward when the safety rod 71 opens the firing handle 51 .

[0155] In the present embodiment, a blocking assembly is provided in the blocking device of the firing safety device. When the anvil assembly 2 reaches the firing position, the blocking assembly can be separated from the safety rod 71 driven by the anvil moving assembly 3. At this time, the safety rod 71 can be rotated and separated from the firing handle 51, so that the operator can operate the firing handle 51 to realize the firing of the anorectal stapler; when the anvil assembly 2 is not in the firing position and the safety rod 71 opens the firing handle 51, the blocking assembly in the blocking device and the forward stop block 13 jointly limit the rotation of the safety rod 71, and the firing handle 51 cannot be moved at this time, thereby realizing the firing safety function and being very convenient to use.

[0156] The anvil seat moving component 3 drives the anvil seat component 2 to move, so that the distance between the anvil seat component 2 and the nail magazine 11 becomes smaller. The distance between the nail magazine 11 and the anvil seat component 2 is 0.5-0.8MM, and the axial distance of the adsorption channel 10 is only about 0.5mm. The end of the anorectal stapler is inserted into the anus to a suitable position, and the tissue is divided into three parts by the dividing groove 12 of the head to facilitate three-point negative pressure suction. Then, negative pressure is formed in the negative pressure channel 20 to adsorb the prolapsed part of the tissue mucosa, close the pressure relief device, open the negative pressure machine, and attract the prolapsed part of the tissue mucosa. With the adsorption of the tissue, it enters the adsorption channel 10 of the anorectal stapler, and then the anvil seat moving component 3 is moved to make the anorectal stapler The seat assembly 3 gradually moves away from the nail magazine 11, so that the amount of tissue in the adsorption channel 10 gradually increases. When the negative pressure in the negative pressure channel 20 reaches 0.1 MPa-0.075 MPa, the nail seat moving assembly 3 is moved to make the nail seat assembly 2 gradually squeeze the tissue in the adsorption channel 10. When the nail seat assembly 2 reaches the firing position, the pull rod sleeve 35 pushes the moving block 72, opens the safety lever 71, and holds the firing handle 51 to fire. After the firing is completed, the pressure relief device is opened to release the negative pressure, and the anorectal stapler is withdrawn from the anus to complete the resection operation. In this way, the prolapsed part of the mucosa can be adsorbed by negative pressure, which is conducive to the rapid and effective completion of the operation and greatly reduces the workload of the doctor.

[0157] The specific embodiments described above further illustrate the technical problems, technical solutions and beneficial effects solved by the present invention. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

[0158] In the description of the present invention, it is necessary to understand that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0159] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0160] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0161] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0162] In the present invention, unless otherwise clearly specified and limited, a first feature being above or below a second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. Moreover, a first feature being above, above, and above a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being below, below, and below a second feature includes the first feature being directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

Claims

1. A negative pressure anorectal stapler, characterized in that: It comprises a fixing assembly (1), an anvil assembly (2), an anvil moving assembly (3), a kiss cutting assembly (4) and a firing assembly (5); wherein: The fixing assembly (1) comprises a nail magazine (11), and the nail magazine (11) is provided with at least one suction port (11a); The kiss-cutting assembly (4) comprises a nail-pushing sheet (41) and a cutting knife (42) mounted on the nail-pushing sheet (41); The firing assembly (5) is connected to the kiss cutting assembly (4); The anvil seat assembly (2) is connected to the anvil seat moving assembly (3); An adsorption channel (10) is provided between the anvil assembly (2) and the nail magazine (11), the channel being in communication with the adsorption port (11a) and being adapted to be supplied with negative pressure; The anvil seat moving assembly (3) is adapted to be actuated to drive the anvil seat assembly (2) to move axially, the anvil seat assembly (2) having a firing position during the axial movement, and before the anvil seat assembly (2) reaches the firing position, the adsorption channel (10) supplied with negative pressure is adapted to adsorb tissue from the adsorption port (11a); when the anvil seat assembly (2) reaches the firing position, the tissue adsorbed by the adsorption channel (10) is pressed between the anvil seat assembly (2) and the nail magazine (11); The firing assembly (5) is adapted to be actuated after the anvil assembly (2) reaches the firing position to push the kissing assembly (4) so ​​that the cutting knife (42), the suture staples in the staple cartridge (11) and the anvil assembly (2) cooperate to kiss the tissue pressed between the anvil assembly (2) and the staple cartridge (11); The anvil seat moving assembly (3) is provided with a negative pressure channel (20) which is connected to the adsorption channel (10), and negative pressure is supplied to the adsorption channel (10) from the negative pressure channel (20); The firing assembly (5) comprises a firing handle assembly and a nail pushing assembly, wherein the firing handle assembly is connected to the nail pushing piece (41) via the nail pushing assembly so as to drive the nail pushing piece (41) to move via the nail pushing assembly; An elastic member is provided between the nail pushing assembly and the fixing assembly (1) and is suitable for resetting the nail pushing assembly and the nail pushing sheet (41) after firing; The firing handle assembly comprises a firing handle (51) and a connecting rod (52), wherein the connecting rod (52) is hinged to the fixing assembly (1), the connecting rod (52) is hinged to the firing handle (51), and the firing handle (51) is hinged to the pin pushing assembly; It also includes a firing safety device (7), wherein the firing safety device (7) includes: A safety lever (71) hinged to the fixing assembly (1) and adapted to prop open the firing handle (51) to prevent the firing handle (51) from moving; A blocking device, the blocking device comprising a blocking component connected to the anvil seat moving component (3) and a safety rod forward rotation blocking component; When the anvil assembly (2) is not in the firing position and the safety rod (71) opens the firing handle (51), the blocking device contacts the safety rod (71) to block the safety rod (71) from rotating; When the anvil assembly (2) reaches the firing position, the blocking assembly in the blocking device is driven by the anvil moving assembly (3) to separate from the safety rod (71), and the safety rod (71) is suitable for rotating to separate from the firing handle (51); The blocking assembly is suitable for preventing the safety rod (71) from rotating backwards, and the blocking assembly comprises: A movable stopper (72) slidably connected to the fixed assembly (1) and connected to the anvil seat movable assembly so as to move with the anvil seat movable assembly, the movable stopper (72) being adapted to contact or disengage from the safety rod (71); a stopper resetting elastic member (73) disposed between the movable stopper (72) and the fixed assembly (1) for resetting the movable stopper (72); The safety rod forward rotation blocking assembly comprises a forward rotation blocking block (13) which is arranged on the fixing assembly (1) and cooperates with the safety rod (71) to block the safety rod from rotating forward when the safety rod (71) opens the firing handle (51).

2. The negative pressure anorectal stapler according to claim 1, characterized in that: It also includes an adsorption negative pressure indicating device (6); wherein the adsorption negative pressure indicating device includes: An indicating negative pressure tube (61), the indicating negative pressure tube (61) having an isobaric cavity (61a), the isobaric cavity (61a) being in communication with the negative pressure channel (20); An indicator needle (62), the indicator needle (62) being slidably mounted on the indicating negative pressure tube (61), and at least a portion of the indicator needle (62) extending into the isobaric chamber (61a), the indicator needle (62) being adapted to move on the indicating negative pressure tube (61) when the pressure in the isobaric chamber (61a) changes.

3. The negative pressure anorectal stapler according to claim 2, characterized in that: The adsorption negative pressure indicating device (6) further comprises a pressure relief device; The indicating negative pressure tube (61) is provided with a pressure relief hole (61b) which is in communication with the isobaric chamber (61a); The pressure relief device is suitable for being actuated to block the pressure relief hole (61b) or to open the pressure relief hole (61b).

4. The negative pressure anorectal stapler according to claim 1, characterized in that: The head end of the nail magazine (11) is sealed; The rear end of the staple cartridge (11) is sealed by a staple cartridge wall (11b) that accommodates suture staples; The anvil moving assembly (3) passes through the nail magazine wall (11b), and the connection portion between the anvil moving assembly (3) and the nail magazine wall (11b) is sealed; The head end of the nail magazine (11), the nail magazine wall (11b) and the peripheral wall of the nail magazine (11) form an anvil accommodating cavity for accommodating the anvil assembly (2), and the adsorption channel (10) is formed between the anvil assembly (2) and the nail magazine wall (11b); The suction port (11a) is formed on the peripheral wall of the nail magazine (11).

5. The negative pressure anorectal stapler according to claim 4, characterized in that: The staple cartridge wall (11b) is provided with at least one staple hole portion (11b1) for accommodating a suture staple and at least one cutting knife hole (11b2); At least one sealing gasket (11c) is provided on the nail magazine (11), and the sealing gasket (11c) blocks the nail hole portion (11b1) and the cutting knife hole (11b2).

6. The negative pressure anorectal stapler according to claim 1, characterized in that: At least two suction ports (11a) are arranged along the circumference of the nail magazine (11); The fixing component (1) is provided with a separation groove (12) between two adjacent adsorption ports (11a) in the circumferential direction thereof, which is suitable for embedding into tissue to separate the tissue.

7. The negative pressure anorectal stapler according to claim 1, characterized in that: The anvil seat moving assembly (3) comprises a pull rod assembly and a driving assembly connected to the pull rod assembly to drive the pull rod assembly to move axially; wherein: The drive assembly comprises: a pushing sleeve assembly (31) rotatably connected to the pull rod assembly, the pushing sleeve assembly (31) being movably mounted on the fixed assembly (1), the pushing sleeve assembly (31) being suitable for circumferential rotation on the fixed assembly (1); a push block (32) disposed between the push sleeve assembly (31) and the fixed assembly (1) and configured to push the push sleeve assembly (31) to move axially during the circumferential rotation of the push sleeve assembly (31); An adjusting nut (33) rotatably connected to the fixing assembly (1), wherein the adjusting nut (33) is connected to the pushing sleeve assembly (31); The pull rod assembly comprises a pull rod (34) and a pull rod sleeve (35); the pull rod (34) is slidably mounted on the fixed assembly (1); the pull rod (34) is connected to the pull rod sleeve (35); and the pull rod sleeve (35) is rotationally connected to the push sleeve assembly (35).

8. The negative pressure anorectal stapler according to claim 7, characterized in that: The anvil seat moving assembly (3) is provided with a negative pressure channel (20) which is connected to the adsorption channel (10), and negative pressure is supplied to the adsorption channel (10) from the negative pressure channel (20); A negative pressure pipe joint (31a) is provided at the rear end of the push sleeve assembly (31), and a joint passage (30) is provided inside the push sleeve assembly (31); The pull rod (34) is provided with a hollow cavity (34a), and the hollow cavity (34a), the joint channel (30), and the negative pressure pipe joint (31a) are connected to form a negative pressure channel (20).

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